• Why are local resources accessed slowly when loopback or local IP address is used whereas accessing the same resources over the network works fine?

    Hi there, In today’s blog post, I’m going to talk about a local resource access performance issue. One of our customers reported that SQL server instances running on a Windows 2003 server were failing over to another node especially...
  • Effects of incorrect QoS policies: A story behind a slow file copy...

    Hi there, In this blog post, I’ll talk about another network trace analysis scenario. The problem was that some Windows XP clients were copying files from a NAS device very slowly compared to others. As one of the most useful logs to...
  • Where have those AFD driver related registry (DynamicBacklogGrowthDelta / EnableDynamicBacklog ...) keys gone?

    Hi there, In today’s blog post, I’m going to talk about some registry keys that were removed as of Windows 2008. Recently a colleague raised a customer question about configuring the following AFD related registry keys on Windows 2008...
  • Does sqllogship.exe have anything to do with web servers in the internet? Story behind CRL check for certificates ...

    Hi there, In today’s blog post I’m going to talk about a network trace analysis scenario where I was requested to analyze a few network traces to understand why a server was trying to contact external web servers when sqllogship.exe...
  • Where are my packets? Analyzing a packet drop issue...

    One of the most common reasons for network connectivity or performance problems is packet drop. In this blog post, I’ll be talking about analyzing a packet drop issue, please read on. One of customers was complaining about remote SCCM agent...